摘要
该研究在高浓度蛋白废水厌氧消化中采用脱氨膜对氨氮进行回收,缓解厌氧消化过程中氨抑制的同时回收氨资源。研究结果表明,与对照组相比,经脱氨膜处理后,实验组反应器中氨氮浓度维持在较低水平(2 000 mg/L以下),累计产甲烷量较对照组反应器提高了54%,化学需氧量去除率提高了88%。该废水厌氧消化过程中氢营养型产甲烷菌为优势菌群,经膜脱氨处理后,实验组反应器可以富集蛋白质和酸降解细菌,将有机物转化为乙酸、H_(2)和CO_(2),促进了嗜氢产甲烷和直接种间电子传递过程。同时,脱氨过程可以缓解氨氮抑制,并促进了厌氧消化过程中各种关键酶的活性,从而提高了高浓度蛋白废水厌氧消化性能。该研究可以为促进高浓度蛋白废水厌氧消化性能提供一种可行的技术方案。
Wastewater with high content of protein usually produced in many factories for food processing.For treating this kind of wastewater,anaerobic digestion could be an efficient and cost-effective method,and resource recovery can be attained.However,the activity of the methanogens could be inhibited by the produced ammonia that converted from the contained protein,and result in lower anaerobic digestion performance.In this study,a membrane contactor for ammonia removal was applied for ammonia recovery during the anaerobic digestion process of wastewater with high content of protein,aiming at alleviating the inhibitory effect of ammonia and at the same time recovering ammonia from wastewater.The results showed that,compared with the control group,the ammonia maintained at a low level(lower than 2000 mg/L)in the experimental reactor with ammonia recovery,the cumulative methane production increased by 54%,and the COD removal rate increased by 88%.Hydrogentrophic methanogens were dominant during the anaerobic digestion of wastewater with high content of protein,and a large number of protein and acid degrading bacteria enriched in the experimental reactor after ammonia recovery.It was beneficial for the conversion of organic substances into acetic acid,H_(2)and CO_(2),and promoted the hydrophilic methanogenesis and direct interspecies electron transfer(DIET)efficiency.Furthermore,ammonia recovery alleviated the inhibitory effect of ammonia,promoted the activity of key enzymes,and ultimately enhanced the anaerobic digestion performance.This study could provide a promising method for anaerobic digestion of wastewater with high content of protein.
作者
杜阳
华天予
肖壮波
屈云贺
赵明星
阮文权
施万胜
DU Yang;HUA Tianyu;XIAO Zhuangbo;QU Yunhe;ZHAO Mingxing;RUAN Wenquan;SHI Wansheng(School of Environment and Civil Engineering,Jiangnan University,Wuxi 214122,China;Wuxi City Environmental Technology Co.Ltd.,Wuxi 214026,China)
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2023年第14期16-24,共9页
Food and Fermentation Industries
基金
国家重点研发计划项目(2021YFC2102203)。
关键词
高浓度蛋白废水
厌氧消化
氨抑制
氨资源
产甲烷
wastewater with high content of protein
anaerobic digestion
ammonia inhibition
ammonia resource
methane production
